Bush will play Erin Lindsay, a member of the CPD investigative team who has an "unexpected past." Flueger, on the other hand, will portray Kyle Ruzek, a hot-headed rookie selected by Voight (
Jason Beghe) from the academy for some dangerous undercover work at the intelligence unit.

The two join a "Chicago PD" cast that also includes
Jesse Lee Soffer (another "Hatfields" castoff) and
Jon Seda.